Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:37:32 2012 Optimize a model with 594 rows, 153 columns and 1188 nonzeros Presolve removed 113 rows and 0 columns Presolve time: 0.00s Presolved: 481 rows, 153 columns, 1039 nonzeros Variable types: 0 continuous, 153 integer (153 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 6.366667e+01, 254 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 63.66667 0 140 46.00000 63.66667 38.4% - 0s 0 0 62.00000 0 120 46.00000 62.00000 34.8% - 0s 0 0 61.60000 0 147 46.00000 61.60000 33.9% - 0s H 0 0 49.0000000 61.60000 25.7% - 0s 0 0 60.78788 0 149 49.00000 60.78788 24.1% - 0s 0 0 60.22711 0 149 49.00000 60.22711 22.9% - 0s H 0 0 51.0000000 60.22711 18.1% - 0s 0 0 59.85018 0 147 51.00000 59.85018 17.4% - 0s 0 0 59.60029 0 145 51.00000 59.60029 16.9% - 0s 0 0 59.47254 0 147 51.00000 59.47254 16.6% - 0s 0 0 59.33934 0 148 51.00000 59.33934 16.4% - 0s 0 0 59.17480 0 149 51.00000 59.17480 16.0% - 0s 0 0 59.04914 0 151 51.00000 59.04914 15.8% - 0s 0 0 59.03023 0 150 51.00000 59.03023 15.7% - 0s 0 0 58.97637 0 150 51.00000 58.97637 15.6% - 0s 0 0 58.97637 0 150 51.00000 58.97637 15.6% - 0s H 0 0 52.0000000 58.97637 13.4% - 0s 0 2 58.95558 0 150 52.00000 58.95558 13.4% - 0s * 94 40 18 53.0000000 58.37709 10.1% 39.0 0s * 104 31 10 54.0000000 58.37366 8.10% 39.9 0s Cutting planes: Gomory: 1 Zero half: 155 Explored 596 nodes (24138 simplex iterations) in 0.97 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.400000000000e+01, best bound 5.400000000000e+01, gap 0.0%